Buggy code:
public abstract class FieldAccessorNode extends Node { protected final int fieldIndex ; public static FieldAccessorNode . AbstractReadFieldNode createRead ( final int fieldIndex ) { } public static FieldAccessorNode . AbstractWriteFieldNode createWrite ( final int fieldIndex ) { } public FieldAccessorNode ( final int fieldIndex ) { } public final int getFieldIndex ( ) { } public static abstract class AbstractReadFieldNode extends FieldAccessorNode { public AbstractReadFieldNode ( final int fieldIndex ) { } public abstract Object read ( SObject obj ) { } public long readLong ( final SObject obj ) throws UnexpectedResultException { } public double readDouble ( final SObject obj ) throws UnexpectedResultException { } protected final Object specializeAndRead ( final SObject obj , final String reason , final FieldAccessorNode . AbstractReadFieldNode next ) { } protected final FieldAccessorNode . AbstractReadFieldNode specialize ( final SObject obj , final String reason , final FieldAccessorNode . AbstractReadFieldNode next ) { } } public static final class UninitializedReadFieldNode extends FieldAccessorNode . AbstractReadFieldNode { public UninitializedReadFieldNode ( final int fieldIndex ) { } @ Override public Object read ( final SObject obj ) { } } public static abstract class ReadSpecializedFieldNode extends FieldAccessorNode . AbstractReadFieldNode { protected final ObjectLayout layout ; @ Child private FieldAccessorNode . AbstractReadFieldNode nextInCache ; public ReadSpecializedFieldNode ( final int fieldIndex , final ObjectLayout layout , final FieldAccessorNode . AbstractReadFieldNode next ) { } protected final boolean hasExpectedLayout ( final SObject obj ) { } protected final FieldAccessorNode . AbstractReadFieldNode respecializedNodeOrNext ( final SObject obj ) { } } public static final class ReadUnwrittenFieldNode extends FieldAccessorNode . ReadSpecializedFieldNode { public ReadUnwrittenFieldNode ( final int fieldIndex , final ObjectLayout layout , final FieldAccessorNode . AbstractReadFieldNode next ) { } @ Override public Object read ( final SObject obj ) { } } public static final class ReadLongFieldNode extends FieldAccessorNode . ReadSpecializedFieldNode { private final LongStorageLocation storage ; public ReadLongFieldNode ( final int fieldIndex , final ObjectLayout layout , final FieldAccessorNode . AbstractReadFieldNode next ) { } @ Override public long readLong ( final SObject obj ) throws UnexpectedResultException { } @ Override public Object read ( final SObject obj ) { } } public static final class ReadDoubleFieldNode extends FieldAccessorNode . ReadSpecializedFieldNode { private final DoubleStorageLocation storage ; public ReadDoubleFieldNode ( final int fieldIndex , final ObjectLayout layout , final FieldAccessorNode . AbstractReadFieldNode next ) { } @ Override public double readDouble ( final SObject obj ) throws UnexpectedResultException { } @ Override public Object read ( final SObject obj ) { } } public static final class ReadObjectFieldNode extends FieldAccessorNode . ReadSpecializedFieldNode { private final AbstractObjectStorageLocation storage ; public ReadObjectFieldNode ( final int fieldIndex , final ObjectLayout layout , final FieldAccessorNode . AbstractReadFieldNode next ) { } @ Override public Object read ( final SObject obj ) { } } public static abstract class AbstractWriteFieldNode extends FieldAccessorNode { public AbstractWriteFieldNode ( final int fieldIndex ) { } public abstract Object write ( SObject obj , Object value ) { } public long write ( final SObject obj , final long value ) { write ( obj , ( ( Object ) ( value ) ) ) ; return value ; } public double write ( final SObject obj , final double value ) { } protected final void writeAndRespecialize ( final SObject obj , final Object value , final String reason , final FieldAccessorNode . AbstractWriteFieldNode next ) { } } public static final class UninitializedWriteFieldNode extends FieldAccessorNode . AbstractWriteFieldNode { public UninitializedWriteFieldNode ( final int fieldIndex ) { } @ Override public Object write ( final SObject obj , final Object value ) { } } private static abstract class WriteSpecializedFieldNode extends FieldAccessorNode . AbstractWriteFieldNode { protected final ObjectLayout layout ; @ Child protected FieldAccessorNode . AbstractWriteFieldNode nextInCache ; public WriteSpecializedFieldNode ( final int fieldIndex , final ObjectLayout layout , final FieldAccessorNode . AbstractWriteFieldNode next ) { } protected final boolean hasExpectedLayout ( final SObject obj ) { } } public static final class WriteLongFieldNode extends FieldAccessorNode . WriteSpecializedFieldNode { private final LongStorageLocation storage ; public WriteLongFieldNode ( final int fieldIndex , final ObjectLayout layout , final FieldAccessorNode . AbstractWriteFieldNode next ) { } @ Override public long write ( final SObject obj , final long value ) { if ( hasExpectedLayout ( obj ) ) { storage . writeLong ( obj , value ) ; } else { if ( layout . layoutForSameClass ( obj . getObjectLayout ( ) ) ) { <START_BUG> writeAndRespecialize ( obj , value , "update<seq2seq4repair_space>outdated<seq2seq4repair_space>read<seq2seq4repair_space>node" , nextInCache ) ; <END_BUG> } else { nextInCache . write ( obj , value ) ; } } return value ; } @ Override public Object write ( final SObject obj , final Object value ) { } } public static final class WriteDoubleFieldNode extends FieldAccessorNode . WriteSpecializedFieldNode { private final DoubleStorageLocation storage ; public WriteDoubleFieldNode ( final int fieldIndex , final ObjectLayout layout , final FieldAccessorNode . AbstractWriteFieldNode next ) { } @ Override public double write ( final SObject obj , final double value ) { } @ Override public Object write ( final SObject obj , final Object value ) { } } public static final class WriteObjectFieldNode extends FieldAccessorNode . WriteSpecializedFieldNode { private final AbstractObjectStorageLocation storage ; public WriteObjectFieldNode ( final int fieldIndex , final ObjectLayout layout , final FieldAccessorNode . AbstractWriteFieldNode next ) { } @ Override public Object write ( final SObject obj , final Object value ) { } } }

Fix:
writeAndRespecialize ( obj , value , "update<seq2seq4repair_space>outdated<seq2seq4repair_space>write<seq2seq4repair_space>node" , nextInCache ) ;